JP2006276360A - Liquid crystal display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display panel whose display area has a substantially elliptical or circular shape, wherein the display quality of a center part and a corner part in the display area are made uniform. <P>SOLUTION: In the active matrix type liquid crystal display panel 10, wherein the display area DA is formed by sticking a pair of light transmissive substrates 11 and 15 made to face each other by using a sealant and encapsulating a liquid crystal 17 in the space formed by the light transmissive substrates and the sealant and which is provided with a plurality of signal lines Y1,..., Ym, scanning lines X1,..., Xn, pixel transistors 14, pixel electrodes 12 and auxiliary capacitance electrodes 13 on one substrate of the light transmissive substrates, the display area is formed into a substantially elliptical or circular shape, the pair of substrates are cut to the part near to the display area and an area of intersection parts 25, where the plurality of signal lines and scanning lines intersect each other, is changed according to the number of the signal lines that intersect the scanning lines or the number of the scanning lines that intersect the signal lines. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a liquid crystal display panel, and more particularly to a liquid crystal display panel in which the display quality of each part in an active matrix liquid crystal display panel having a substantially elliptical or circular display region is uniform.

First, a general configuration of a conventional active matrix type liquid crystal display panel is shown in FIG. 8 which is a plan view of several pixel portions, and a schematic equivalent circuit diagram of one pixel portion of FIG. 9 and FIG. This will be briefly described with reference to FIG. In the conventional liquid crystal display panel 10A, a region surrounded by scanning lines X ₁ ,..., Xn and signal lines Y ₁ ,. pixel electrodes 12 are provided, the pixel electrode 12 are equivalently represented by a liquid crystal capacitance C _LC in FIG. 9 each. Usually the liquid crystal capacitance C _LC auxiliary capacitance Cs formed by the auxiliary capacitance electrodes 13 are connected in parallel. One end of the liquid crystal capacitance C _LC is connected to the pixel transistor 14 for driving, the other end is connected to a counter electrode 16 provided through the color filter layer CF to the second light-transmitting substrate 15 a predetermined Common potential Vc is applied.

The pixel transistor 14 comprises an insulated gate field effect type thin film transistor TFT (Thin Film Transistor), the source electrode S of which is connected to the signal lines Y ₁ ,..., Ym to receive the supply of the image signal Vs, and the drain. electrode D is connected to one end of the liquid crystal capacitance C _LC, i.e., the pixel electrode 12. Further, the gate electrode G of the pixel transistor 14 is connected to the scanning lines X ₁ ,..., Xn so that a gate pulse Vg having a predetermined voltage is applied. A liquid crystal 17 is sealed between the pixel electrode 12 and the counter electrode 16.

In the liquid crystal display panel 10A, a coupling capacitor _CGD is formed between the liquid crystal capacitor _CLC and the gate electrode G. The coupling capacitance _CGD is a combination of the stray capacitance component between the pixel electrode 12 and the gate line Xn and the parasitic capacitance component between the drain region and the gate region inside the pixel transistor 14, and the latter parasitic capacitance component. Is dominant, and its value varies considerably depending on the individual pixel transistor 14.

The voltage waveform of each part of this one pixel will be described with reference to FIG. In the liquid crystal display panel 10A, the common potential Vc applied to the counter electrode 16 is periodically inverted, and the image signal Vs applied to the signal lines Y ₁ ,. A bias voltage to be inverted is superimposed. Therefore, the pixel transistor operates so that the drain electrode D and the source electrode S are substantially interchanged substantially periodically. Therefore, variations in parasitic capacitance between the gate electrode G and the source electrode S and variations in parasitic capacitance formed between the scanning lines X ₁ ,..., Xn and the signal lines Y ₁ ,. _Leads to variations in the display image of the liquid crystal display device as well as variations in the coupling capacitance _CGD . First, when the gate pulse Vg is applied to the gate electrode G during the selection period of a predetermined pixel, the pixel transistor 14 of this pixel is turned on. At this time, the image signal Vs supplied from the signal line Ym is written into the pixel electrode 12 via the pixel transistor 14 and so-called sampling is performed. Next, when this pixel enters a non-selection period, the application of the gate pulse Vg is stopped and a low level gate voltage is applied, and the pixel transistor 14 is turned off, but the written image signal is held in the liquid crystal capacitor _CLC. ing.

When moving from the selection period to the non-selection period, since the rectangular wave gate pulse Vg falls abruptly from the high level to the low level, accumulated in the liquid crystal capacitance C _LC by coupling through the coupling capacitor C _GD described above this time The discharged electric charge is instantaneously discharged. This causes a voltage shift ΔV (not shown) in the image signal Vs written to the pixel electrode. Accordingly, since the value of the coupling capacitance C _GD varies among the individual pixels of the liquid crystal display panel, the voltage shift ΔV also varies. As a result, the display screen of the liquid crystal panel is changed periodically, so-called flicker. In addition, an afterimage is generated and the display quality is remarkably deteriorated.

Conventionally, for suppressing the absolute amount and the variation of the voltage shift [Delta] V, measures that larger form an auxiliary capacitance Cs connected in parallel to the liquid crystal capacitance C _LC had been taken. That is intended to store charge sufficient to compensate for the amount of charge is discharged via the coupling capacitor C _GD in advance the auxiliary capacitance Cs. The storage capacitor Cs is a so-called Cs on Common type storage capacitor type in which a storage capacitor electrode 13 independent from other electrodes is arranged so as to overlap the pixel electrode 12 and a common voltage is applied to the storage capacitor electrode 13. And a so-called Cs on Gate type additional capacitance type in which a part of the scanning lines X ₁ ,..., Xn is formed so as to overlap with the pixel electrode 12. The liquid crystal display panel 10A shown in FIGS. 8 to 10 is of the Cs on Common type. The Cs on Gate type liquid crystal display panel is the same as the former in that one electrode of the auxiliary capacitor Cs is connected to the drain electrode D of the pixel transistor 14 as compared with the Cs on Common type. The other electrode of the capacitor Cs is different from the former in that it is connected to the scanning lines X ₁ ,..., Xn.

  By the way, in recent years, various small portable terminals equipped with a liquid crystal display panel exist and are widely spread. As such a small mobile terminal, the penetration rate of mobile phones is particularly high, and in addition to the usual call function, functions such as games, watches, cameras, e-mails and Internet terminals are added, and various functions will be added in the future. Has been added and has become an indispensable part of everyday life.

  As such various functions are mounted on a mobile phone, the phone itself, so-called hardware side, is required to be more convenient, lighter and more portable on the one hand, and on the other hand, is designed or user-friendly. A fashion that matches the taste is required, and the shape of the equipment is adapted to this.

  In response to these trends, the display area of the display panel has also been devised, and the display area is mostly rectangular, but some non-rectangular are also used. (See, for example, Patent Document 1 below).

  12A and 12B show a mobile phone described in the following Patent Document 1, FIG. 12A is an external perspective view, and FIG. 12B is an exploded perspective view of a liquid crystal display device mounted on the mobile phone of FIG. is there.

  As shown in FIG. 12, the mobile phone 40 includes liquid crystal panels 41A and 41B, and a housing 42 that accommodates these liquid crystal panels. The housing 42 has a circular opening 42a formed on the surface thereof. The display area of the liquid crystal panel 41B is exposed from the opening 42a.

This display area is formed by combining a rectangular liquid crystal panel 41B and a housing 42 provided with a circular display window. That is, when the liquid crystal panel is accommodated in the housing, the housing covers the surface of the rectangular liquid crystal panel, and the display surface is exposed from the circular opening of the housing, that is, the display window.
JP 2002-287144 A

  However, when a rectangular display panel is applied to a circular display window as described in Patent Document 1, the corner of the panel is covered with a housing and is not used as a display area. A predetermined space is occupied in the housing. For this reason, since each corner is not used as a display area in the liquid crystal panel, the effective display area in the display area is reduced, and the corner not used as the display area occupies a predetermined space in the housing. Downsizing or accommodation of other parts is limited.

  In view of the above problems, the present inventors have changed the shape of the display area of the liquid crystal display panel itself to the shape of a display window, for example, a circular shape so that the liquid crystal display panel does not occupy unnecessary space. It was found that a liquid crystal display panel that does not occupy unnecessary space can be provided by processing the shape itself into a shape close to the shape of the display area.

  FIG. 13 is a plan view showing an array substrate of a liquid crystal display panel having an elliptical display panel according to the shape of the display window. In FIG. 13, the pixels are shown larger than the original size so that the arrangement state of the plurality of pixels provided in the display area DA can be easily understood.

  The liquid crystal display panel shown in FIG. 13 is a polygonal liquid crystal display panel in which corners of a rectangular array substrate 11A and a color filter substrate (not shown) are cut in accordance with the shape of an elliptical display area DA. . In the liquid crystal display panel of such a shape, the panel corner that previously occupied an unnecessary space is cut, so when using it with a mobile phone or the like, other devices are placed in this corner. Therefore, it is possible to reduce the size of a mobile phone or the like.

However, in such an active matrix type liquid crystal display panel, regardless of whether it is of the Cs on Common system or the Cs on Gate system, as shown in FIG. The number of pixels arranged in a row in the horizontal direction at the corner E in the vertical direction is smaller than the number of pixels arranged in a row in the horizontal direction at the center F in the vertical direction. In this case, since the number of pixel transistors 14 connected to the scanning lines X ₁ ,..., Xn extending in the horizontal direction differs depending on the wiring position, the signal lines Y ₁ ,. X _1, · · ·, variations occur in the sum in the horizontal direction or the vertical direction of the parasitic capacitance generated at the intersection of the Xn, absolute amount of voltage shift ΔV of the aforementioned I than is different in its wiring position, the display area DA There is a problem that the overall contrast cannot be kept uniform. The same can be said for the pixels arranged in a line in the vertical direction with respect to this wiring position.

  Therefore, the present inventors have studied various methods for solving the above problems, and as a result, the scanning lines and signal lines wired at the intersections and corners of the scanning lines and signal lines wired in the center of the display area. If the shape of the scanning line or signal line is changed so that the area with the intersection is different and the total area of the intersection located in a row in the vertical or horizontal direction is made equal at the center and corners of the display area, this The present inventors have found that it is possible to eliminate the non-uniform contrast caused by the parasitic capacitance, and have reached the present invention.

  That is, an object of the present invention is to provide a liquid crystal display panel in which the display area is substantially elliptical or circular in shape, and the display quality of the display area is uniform at the center and corners. It is in.

In order to achieve the above object, a liquid crystal display panel according to claim 1 is a liquid crystal display panel according to claim 1, wherein a pair of translucent substrates are opposed to each other and bonded together with a sealing material, and liquid crystal is formed in a space formed by the translucent substrate and the sealing material. A display area is formed by encapsulating a plurality of signal lines and scanning lines arranged in a matrix on one substrate of the translucent substrate, and intersections of the signal lines and scanning lines. A pixel transistor disposed in the vicinity, a pixel electrode disposed at a position surrounded by each signal line and scanning line and connected to the pixel transistor, and an auxiliary capacitor provided below the pixel electrode An active matrix type liquid crystal display panel comprising electrodes,
The display area is formed substantially in an oval or circular shape, and the pair of substrates is cut to near the display area,
The area of the intersection where the plurality of signal lines and the scanning line intersect is changed according to the number of signal lines intersecting the scanning line or the number of scanning lines intersecting the signal line.

  The invention according to claim 2 relates to the liquid crystal display panel according to claim 1, wherein the signal lines are inversely proportional to the number of signal lines intersecting the scanning lines or the number of scanning lines intersecting the signal lines. And the area of the intersection where the scanning lines intersect is widened.

  The invention according to claim 3 relates to the liquid crystal display panel according to claim 1 or 2, wherein the area of the intersection is along the scanning line or signal line intersecting the signal line or scanning line. The area of the intersection is changed by forming an extension.

  According to a fourth aspect of the present invention, there is provided the liquid crystal display panel according to any one of the first to third aspects, wherein one signal line and one intersection per signal line and the intersection formed by the signal lines. The area of the intersection is determined so that the total sum of the areas becomes equal.

  The present invention has the following excellent effects by having the above-described configuration. That is, according to the invention of claim 1, a signal of a liquid crystal display panel having a display area substantially having an elliptical shape or a circular shape is provided. By changing the intersection of lines and scan lines according to the number of intersecting scan lines or signal lines, the coupling (parasitic) capacitance formed at this intersection can be made uniform for all pixels. The display quality at each position in the display area can be made uniform.

  According to the invention of claim 2, the coupling (parasitic) capacitance generated at the intersection of the scanning line and the signal line is made uniform by increasing the area of the intersection in inverse proportion to the number of signal lines or scanning lines that intersect. Can be.

  According to the invention of claim 3, since the area of the facing portion at the crossing portion can be changed by forming the extension portion on the scanning line or the signal line, the coupling capacitance can be made uniform by a simple method. Can do.

  According to the invention of claim 4, if the area of the intersection is changed so that the total sum of the areas of the intersection per scanning line or per signal line is all equal, the intersection of the scanning line and the signal line All the coupling (parasitic) capacitance generated in the above can be made uniform.

  Hereinafter, the best embodiment of the present invention will be described with reference to the drawings. However, the embodiments described below exemplify liquid crystal display panels for embodying the technical idea of the present invention, and are not intended to specify the present invention. Other embodiments included in are equally applicable. In the following embodiments, the same reference numerals are given to the parts having the same configurations as those of the conventional liquid crystal display panel shown in FIGS.

  1 is a plan view showing a liquid crystal display panel according to an embodiment of the present invention, FIG. 2 is a plan view showing an array substrate of the liquid crystal display panel of FIG. 1, and FIG. 3 is a plurality of substrates formed on the array substrate of FIG. 4 is an enlarged plan view showing several pixel portions of the pixel, FIG. 4 is an enlarged view showing the intersection of the scanning lines and the signal lines, and FIG. 4A is an enlarged view of a portion A1 in FIG. (B) is an enlarged view of part A2 in FIG. 1, FIG. 5 is a schematic equivalent circuit diagram of one pixel, FIG. 6 is a cross-sectional view taken along line AA in FIG. 3, and FIG. FIG. In FIG. 1, the pixels are shown larger than the original size so that the arrangement state of the plurality of pixels provided in the display area DA can be easily understood.

  As shown in FIG. 1, the liquid crystal display panel 10 of the present invention includes an elliptical display area DA in which the longitudinal length L1 is longer than the lateral length L2, and is made of a pair of glass substrates. The substrates 11 and 15 are opposed to each other and bonded together with a sealing material, and liquid crystal is sealed inside. The pair of translucent substrates 11 and 15 are formed in a polygonal shape in which corners of a rectangular substrate are cut in accordance with the shape of the display area DA, and the cut corners are mounted on a mobile phone or the like. When it is done, it becomes an installation space for other components.

Also, of the pair of light-transmitting substrate 11 and 15, the first light-transmissive substrate 11 disposed on the rear surface, as shown in FIG. 2, a plurality of scanning lines on the surface where the liquid crystal is sealed X ₁ , · · ·, Xn and signal lines _Y 1, · · ·, Ym are wired in a matrix, the scanning line _X 1 is at one end 11 ₄ thereof, · · ·, Xn and signal lines _{Y 1} ,..., Ym is formed with a driver placement area 21 on which a driver LSI 22 that outputs a control signal is placed. The driver placement area 21 has the scanning lines X ₁ ,. An array substrate on which signal lines Y ₁ ,..., Ym are routed is formed. Further, the second translucent substrate 15 disposed on the front surface forms a color filter substrate in which the color filter layer CF and the counter electrode 16 (see FIG. 6) are formed on the surface where the liquid crystal is sealed. The second translucent substrate 15 has one side edge shorter than that of the first translucent substrate 11 because the driver mounting area is not formed.

The configuration of the intersection of the scanning lines X ₁ ,..., Xn and the signal lines Y ₁ ,..., Ym in the liquid crystal display panel 10 having the above configuration will be described in detail below with reference to FIG. explain.

Figure 4 cross section 25A of the scanning lines and the signal lines shown in (a), as shown in Figure 1 A1, scan lines for forming the pixel positioned at the upper portion in the longitudinal direction X ₁ and the signal line Ym ' 4B, the scanning line and signal line crossing 25B shown in FIG. 4B is a scanning line Xn for forming a pixel located at the center in the vertical direction as indicated by A2 in FIG. 'And a signal line Ym "are shown. In FIG. 4, the crossing part of the scanning line and the signal line is shown so as to be clear.

According to this intersection, the scanning line Xn ′ and the signal line Ym ″ shown in FIG. 4B are also formed linearly at the intersection 25B, whereas the scanning line X shown in FIG. ₁ and the signal line Ym 'is, in the scanning line X ₁ is the cross section 25B, has an extension portion 26 which extends downwardly, as a result, the display area DA central portion of the scan line Xn shown in FIG. 4 (b) The area of the intersection 25A is larger than that of the intersection 25B of 'and the signal line Ym ". In FIG. 4A, the extension 26 is described as extending from the scanning lines X ₁ ,..., Xn, but the scanning lines intersecting with the signal lines Y ₁ ,. X _1, ···, it may form an extension 26 along the Xn.

  The extension portion 26 is formed so that the sum of the areas of a plurality of intersecting portions arranged in parallel in the vertical direction or the horizontal direction is the same in all columns and rows. Therefore, the shape of the intersection formed in this way is such that the extension 26 is formed so that the area of the intersection near the corner of the display area is large, and the intersection 25A located at the center is Since there is no need to change the area, the extension 26 is not provided. If formed in this way, the voltage shift ΔV of the pixel signal Vs related to the coupling (parasitic) capacitance generated at the intersection is constant at both the corner and the center.

  Hereinafter, the wiring structure of the liquid crystal display panel 10 of the present embodiment will be described mainly with reference to FIGS.

FIG. 3 is an enlarged plan view showing a pixel formed in the central portion of the display area DA among several pixels formed on the substrate. The liquid crystal display panel 10 shown in FIG. 3 is a Cs On Gate type liquid crystal display panel. Specifically, the scanning lines X ₁ ,... Provided in a matrix on the first light-transmitting substrate 11. A pixel electrode 12 is provided in each region surrounded by Xn and signal lines Y ₁ ,..., Ym, and an auxiliary capacitance electrode 13 and a pixel transistor 14 are provided below the pixel electrode 12. The second light-transmitting substrate 15 is provided with a counter electrode 16 provided through a color filter layer CF (see FIG. 6). A liquid crystal 17 is sealed between the pixel electrode 12 and the counter electrode 16.

The pixel transistor 14 is made of TFT, the source electrode S is connected to the signal lines Y ₁ ,..., Ym, the drain electrode D is connected to the pixel electrode 12, and the gate electrode of the pixel transistor 14 is further connected. G is connected to scanning lines X ₁ ,..., Xn.

Further, the auxiliary capacitance electrode 13 is disposed so as to face the drain electrode D via the insulating film 18, and its end is electrically connected to the scanning lines X ₁ ,..., Xn. 13 and the scanning lines X ₁ ,..., Xn are formed of a light shielding member.

Next, a method for manufacturing the liquid crystal display panel 10 will be described. First, scanning lines X ₁ ,..., Xn are formed in a predetermined pattern on the surface of the first light-transmitting substrate 11 directly or through an insulating film (not shown). At this time, the scan lines _X 1 gate electrode G and the auxiliary capacitance electrodes 13, ..., while being Xn simultaneously formed, the extension 26 also the scanning lines _X 1, ..., are Xn simultaneously formed. The shape of the extension 26 is set in advance according to the shape of the display area as described above. The scanning lines X ₁ ,..., Xn, the gate electrode G, and the auxiliary capacitance electrode 13 are made of a light-shielding conductive member such as aluminum or an aluminum alloy.

Next, the surface of the first light transmissive member 11 is covered with an insulating material 18 made of SiO ₂ or SiN, and an amorphous-Si layer 20 is formed so as to face the gate electrode G through the insulating material 18. The signal lines Y ₁ ,..., Ym are formed in positions orthogonal to the scanning lines X ₁ ,..., Xn and overlapping the extension 26, and partially overlap the amorphous-Si layer 20. In this manner, the pixel transistor 14 is formed by providing the source electrode S and the drain electrode D extending from the signal lines Y ₁ ,..., Ym. The signal lines Y ₁ ,..., Ym, the source electrode S and the drain electrode D are made of Mo / Al / Mo.

The drain electrode D of the pixel transistor 14 is disposed opposite to the auxiliary capacitance electrode 13 via an insulating film, thereby forming an auxiliary capacitance Cs. The drain electrode D is the liquid crystal capacitance C _LC is formed monkey one end is connected to the pixel electrode 12. The pixel electrode 12 is electrically connected to the drain electrode D of the pixel transistor 14 so as to cover a region partitioned by the scanning lines X ₁ ,..., Xn and the signal lines Y ₁ ,. Form.

  Then, a color filter substrate in which a transparent counter electrode 16 made of a color filter layer CF and ITO is separately provided on the surface of the second translucent substrate 15, and a liquid crystal 17 is sealed between them. The liquid crystal display panel 10 is completed. An equivalent circuit for one pixel of the liquid crystal display panel is as shown in FIG. 5, and the auxiliary capacitor Cs is formed between the pixel electrode 12 and the gate electrode G. Become.

Next, the voltage waveform of each part of this one pixel will be described with reference to FIG. In the liquid crystal display panel 10, the common potential Vc applied to the counter electrode 16 is periodically inverted, and the image signal Vs applied to the signal lines Y ₁ ,. A reverse bias voltage is superimposed.

In addition, the scanning signal Vg is applied with a voltage synchronized with the common potential during the non-selection period, and during the selection period of the pixel, the gate transistor is turned on by applying a gate pulse to the gate electrode. The image signal Vs supplied from the line Ym is written to the pixel electrode 12 via the pixel transistor 14. Next, when this pixel enters a non-selection period, the application of the gate pulse Vg is stopped and a low level gate voltage is applied, and the pixel transistor 14 is turned off, but the written image signal is held in the liquid crystal capacitor _CLC. ing.

When the transition from the selection period to the non-selection period occurs, the rectangular wave gate pulse Vg suddenly falls from the high level to the low level. At this time, the liquid crystal capacitance C _LC is coupled to the liquid crystal capacitance C _LC through the coupling capacitance C _GD described above. Since the stored charge is instantaneously discharged, a voltage shift ΔV (not shown) is generated in the image signal Vs written to the pixel electrode. However, in the liquid crystal display panel 10 of the present embodiment, since a large auxiliary capacitor of the Cs on Gate method is formed, the amount of charge discharged through the coupling capacitor _CGD can be sufficiently compensated, so flicker and Afterimages are not generated, and the extension portions 26 are formed at the intersecting portions 25A and 25B of the scanning lines X ₁ ,..., Xn and the signal lines Y ₁ ,. Since the sum of the areas of the intersections arranged in parallel is equal, the coupling (parasitic) capacitance generated at the intersections 25A and 25B is uniform, and a liquid crystal display panel with good display quality can be obtained.

  In addition, in the liquid crystal display panel 10 of the present invention, even if the region for forming the conductive pattern is narrowed by changing the substrate shape in accordance with changing the display area to an elliptical shape or the like. Since the auxiliary capacitance electrode 13 of the Cs on Gate method is used, wiring can be omitted compared to the Cs on Common method, and the wiring space can be used effectively. And a short circuit between wirings can be suppressed.

FIG. 1 is a plan view showing a liquid crystal display panel according to an embodiment of the present invention, FIG. 2 is a plan view showing an array substrate of the liquid crystal display panel of FIG. 3 is an enlarged plan view showing several pixel portions among a plurality of pixels formed on the array substrate of FIG. 4 is an enlarged view of the intersection of the scanning line and the signal line, FIG. 4 (a) is an enlarged view of the A1 portion in FIG. 1, and FIG. 4 (b) is an enlarged view of the A2 portion in FIG. FIG. 5 is a schematic equivalent circuit diagram of one pixel according to the present embodiment. 6 is a cross-sectional view taken along the line AA in FIG. FIG. 7 is a diagram showing the voltage waveform of each part of one pixel according to the present embodiment, FIG. 8 is an enlarged plan view showing several pixel portions of pixels of a conventional liquid crystal display panel, FIG. 9 is a schematic equivalent circuit diagram of one pixel according to the prior art, 10 is a cross-sectional view taken along the line BB in FIG. FIG. 11 is a diagram showing a voltage waveform of each part of one pixel according to the prior art, FIG. 12 is a view showing a known mobile phone, FIG. 12 (a) is an external perspective view, FIG. 12 (b) is an exploded perspective view of a liquid crystal display device mounted on the mobile phone of FIG. 12 (a), FIG. 13 is a plan view showing an array substrate of a liquid crystal display panel having an elliptical display panel according to the shape of the display window.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Liquid crystal display panel 11 1st translucent board | substrate 12 Pixel electrode 13 Auxiliary capacitance electrode 14 Pixel transistor 15 2nd translucent board | substrate 16 Counter electrode 17 Liquid crystal 18 Insulating film 20 Amorphous-Si layer 21 Driver mounting area | region 22 Driver LSI
25A, 25B Crossing portion 26 Extension portion S Source electrode G Gate electrode D Drain electrode CF Color filter layer C _LC liquid crystal capacitance Cs Auxiliary capacitance X ₁ ,..., Xn Scan line Y ₁ ,.

Claims (4)

A pair of translucent substrates are opposed to each other with a sealing material, and a display area is formed by sealing liquid crystal in a space formed by the translucent substrate and the sealing material. One substrate is surrounded by a plurality of signal lines and scanning lines arranged in a matrix, a pixel transistor arranged near the intersection of each signal line and scanning line, and each signal line and scanning line. An active matrix type liquid crystal display panel comprising: a pixel electrode disposed at each position and connected to the pixel transistor; and an auxiliary capacitance electrode provided below the pixel electrode,
The display area is formed substantially in an oval or circular shape, and the pair of substrates is cut to near the display area,
A liquid crystal display characterized in that the area of the intersection where the plurality of signal lines and scanning lines intersect is changed according to the number of signal lines intersecting the scanning lines or the number of scanning lines intersecting the signal lines. panel.   2. The area of an intersection where the signal line and the scanning line intersect is increased in inverse proportion to the number of signal lines intersecting the scanning line or the number of scanning lines intersecting the signal line. LCD panel   The area of the intersection is changed by forming an extension along the intersecting scanning line or signal line in the signal line or scanning line. 2. A liquid crystal display panel according to 2. The area of the intersection is determined so that the sum of the areas of the intersection formed by the signal line and the scanning line per scanning line or per signal line is equal. A liquid crystal display panel according to any one of the above.

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